Direct-current cable insulation material

A technology of insulating materials and DC cables, applied in the direction of insulators, organic insulators, plastic/resin/wax insulators, etc., can solve problems such as high local field strength and insulation failure, achieve good insulation performance, excellent electrical conductivity, and suppress space charge cumulative effect

Active Publication Date: 2015-03-25
CHINA ELECTRIC POWER RES INST +2
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the accumulation of space charges will distort the local electric field, which will cause the local field strength in the DC cable insulation to be too high, causing insulation failure. The electric field distribution of the DC cable, it is very important to improve the reliability of its insulation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Direct-current cable insulation material
  • Direct-current cable insulation material
  • Direct-current cable insulation material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the DC cable insulating material comprises the following steps:

[0023] Step 1, take by weight 100 parts of low-density polyethylene, 0.5 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), 2.5 parts of dicumyl peroxide and 2.5 parts of nano aluminum hydroxide. The nano-aluminum hydroxide is modified nano-aluminum hydroxide particles, which are obtained by modifying the nano-aluminum hydroxide particles with a silane coupling agent, dissolving them in cyclohexane, and evaporating and drying them. The mass ratio of the nano aluminum hydroxide particles to the silane coupling agent is 5:100. The average particle size of the nano-aluminum hydroxide is 30±5nm, and the specific surface area is 180±30m 2 / g. The low-density polyethylene has a melt index of 0.8-12g / 10min and a density of 0.90-0.925g / cm 3 .

[0024] Step 2. Add the low-density polyethylene, antioxidant and nano-aluminum hydroxide weighed in step 1 into a twin-screw mixer at the s...

Embodiment 2

[0028] The preparation method of the DC cable insulating material comprises the following steps:

[0029] Step 1, take by weight 100 parts of low-density polyethylene, 0.5 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), 2.5 parts of dicumyl peroxide and 1.5 parts of nano aluminum hydroxide. The nano-aluminum hydroxide is modified nano-aluminum hydroxide particles, which are obtained by modifying the nano-aluminum hydroxide particles with a silane coupling agent, dissolving them in cyclohexane, and evaporating and drying them. The mass ratio of the nano aluminum hydroxide particles to the silane coupling agent is 5:100. The average particle size of the nano-aluminum hydroxide is 30±5nm, and the specific surface area is 180±30m 2 / g. The low-density polyethylene has a melt index of 0.8-12g / 10min and a density of 0.90-0.925g / cm 3 .

[0030] Step 2. Add the low-density polyethylene, antioxidant and nano-aluminum hydroxide weighed in step 1 into a twin-screw mixer at the s...

Embodiment 3

[0034] The preparation method of the DC cable insulating material comprises the following steps:

[0035] Step 1, take by weight 100 parts of low-density polyethylene, 0.5 parts of 4,4'-thiobis(6-tert-butyl-3-methylphenol), 2 parts of dimethylphthalein peroxide and 2 parts Parts of nano aluminum hydroxide. The nano-aluminum hydroxide is modified nano-aluminum hydroxide particles, which are obtained by modifying the nano-aluminum hydroxide particles with a silane coupling agent, dissolving them in cyclohexane, and evaporating and drying them. The mass ratio of the nano aluminum hydroxide particles to the silane coupling agent is 5:100. The average particle size of the nano-aluminum hydroxide is 30±5nm, and the specific surface area is 180±30m 2 / g. The low-density polyethylene has a melt index of 0.8-12g / 10min and a density of 0.90-0.925g / cm 3 .

[0036] Step 2. Add the low-density polyethylene, antioxidant and nano-aluminum hydroxide weighed in step 1 into a twin-screw mi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Melt indexaaaaaaaaaa
Densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a direct-current cable insulation material. The insulation material is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 0.5 to 5 parts of modified nano aluminum hydroxide, 1 to 2.5 parts of a cross-linking agent and 0.1 to 0.5 part of an antioxidant. According to the prepared direct-current cable insulation material, the influence of the temperature to the electric conductivity can be effectively improved, namely the property that the electric conductivity of the polyethylene is increased along with the temperature can be changed, and the property that the field intensity in the direct-current cable insulation is changed along with the change of the temperature can be effectively improved; the insulation material can be used for suppressing the accumulation of the space charge and improving the local electric field distribution, and the insulation property is relatively good.

Description

【Technical field】 [0001] The invention relates to a DC cable insulating material, in particular to a DC cable insulating material added with nanometer aluminum hydroxide particles. 【Background technique】 [0002] The field strength distribution of XLPE DC cables under DC electric field mainly depends on the change of electrical conductivity and the accumulation of space charge. Since the conductivity of cross-linked polyethylene changes with temperature, there is no temperature difference under the insulation of the cable when it is unloaded, so the maximum field strength appears at the conductor shield, and the temperature of the insulation near the core is higher than that at full load. External temperature, so the conductivity distribution gradually decreases from the inside to the outside, that is, the resistivity gradually increases, and places with high resistivity share more voltage, so the field strength outside the insulation is much higher than the inside field str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08L23/06C08K9/06C08K3/22C08K5/14B29B7/00H01B3/44
CPCB29B7/00C08K3/22C08K5/14C08K5/375C08K9/06C08K2003/2227C08K2201/011H01B3/441C08L23/06
Inventor 陈铮铮赵健康欧阳本红蒙绍新李建英王诗航
Owner CHINA ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap